Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Broken lines in the drawings are for the purpose of illustrating portions of the vacuum cleaner that form no part of the claimed design. 

CLAIM We claim the ornamental design for a vacuum cleaner, as shown and described. 